<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>网站正在维护中</title>
</head>
<body>
    <style>
        *{margin:0;padding:0;}
    </style>
    <div style="user-select:none;border:1px solid black;width:800px;height:400px;position: fixed;left:50%;top:50%;margin-left:-400px;margin-top:-200px;background-color: #e7ecef;padding:10px;text-align:center;line-height: 400px;border-radius: 8px;">
        <p>网站正在维护中...</p>
    </div>
</body>
</html>